1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
VikaD [51]
3 years ago
11

Simplify 19 - 1.67 + (-2.4)

Mathematics
2 answers:
melisa1 [442]3 years ago
8 0
Since +(-2.4) is simply +1(-2.4), we get 19-1.67-2.4=14.93
bagirrra123 [75]3 years ago
4 0
19-1.67+(-2.4)=14.93
You might be interested in
. upper left chamber is enlarged, the risk of heart problems is increased. The paper "Left Atrial Size Increases with Body Mass
Sonbull [250]

Answer:

Part 1

(a) 0.28434

(b) 0.43441

(c) 29.9 mm

Part 2

(a) 0.97722

Step-by-step explanation:

There are two questions here. We'll break them into two.

Part 1.

This is a normal distribution problem healthy children having the size of their left atrial diameters normally distributed with

Mean = μ = 26.4 mm

Standard deviation = σ = 4.2 mm

a) proportion of healthy children have left atrial diameters less than 24 mm

P(x < 24)

We first normalize/standardize 24 mm

The standardized score for any value is the value minus the mean then divided by the standard deviation.

z = (x - μ)/σ = (24 - 26.4)/4.2 = -0.57

The required probability

P(x < 24) = P(z < -0.57)

We'll use data from the normal probability table for these probabilities

P(x < 24) = P(z < -0.57) = 0.28434

b) proportion of healthy children have left atrial diameters between 25 and 30 mm

P(25 < x < 30)

We first normalize/standardize 25 mm and 30 mm

For 25 mm

z = (x - μ)/σ = (25 - 26.4)/4.2 = -0.33

For 30 mm

z = (x - μ)/σ = (30 - 26.4)/4.2 = 0.86

The required probability

P(25 < x < 30) = P(-0.33 < z < 0.86)

We'll use data from the normal probability table for these probabilities

P(25 < x < 30) = P(-0.33 < z < 0.86)

= P(z < 0.86) - P(z < -0.33)

= 0.80511 - 0.37070 = 0.43441

c) For healthy children, what is the value for which only about 20% have a larger left atrial diameter.

Let the value be x' and its z-score be z'

P(x > x') = P(z > z') = 20% = 0.20

P(z > z') = 1 - P(z ≤ z') = 0.20

P(z ≤ z') = 0.80

Using normal distribution tables

z' = 0.842

z' = (x' - μ)/σ

0.842 = (x' - 26.4)/4.2

x' = 29.9364 = 29.9 mm

Part 2

Population mean = μ = 65 mm

Population Standard deviation = σ = 5 mm

The central limit theory explains that the sampling distribution extracted from this distribution will approximate a normal distribution with

Sample mean = Population mean

¯x = μₓ = μ = 65 mm

Standard deviation of the distribution of sample means = σₓ = (σ/√n)

where n = Sample size = 100

σₓ = (5/√100) = 0.5 mm

So, probability that the sample mean distance ¯x for these 100 will be between 64 and 67 mm = P(64 < x < 67)

We first normalize/standardize 64 mm and 67 mm

For 64 mm

z = (x - μ)/σ = (64 - 65)/0.5 = -2.00

For 67 mm

z = (x - μ)/σ = (67 - 65)/0.5 = 4.00

The required probability

P(64 < x < 67) = P(-2.00 < z < 4.00)

We'll use data from the normal probability table for these probabilities

P(64 < x < 67) = P(-2.00 < z < 4.00)

= P(z < 4.00) - P(z < -2.00)

= 0.99997 - 0.02275 = 0.97722

Hope this Helps!!!

7 0
3 years ago
When a denominator is greater then numerator does the cutting fraction stop there?or it can still be reduced
omeli [17]

Answer:

When the denominator is greater than the numerator, the cutting fraction continues and it can still be reduced

Step-by-step explanation:

Pls mark brainliest

4 0
1 year ago
Read 2 more answers
Drag the dots to plot (5.5, 4), (-7,1), and (0,–9).<br> y
AURORKA [14]

5.5 always goes between 5 and 6

remember (x,y) one of the dots goes on the exactly on the axis, you have to drag it down to -9 from the y-axis

3 0
2 years ago
Is 8.012 greater than 8.03
morpeh [17]
Answer: No, 8.03 is greater than 8.012
8 0
2 years ago
Read 2 more answers
What is the magnitude of -3 +4i?
Goshia [24]

Answer:

we have

-3+4i

let magnitude be |z|

|z|=\sqrt{( - 3) {}^{2}  + 4 {}^{2} }

|z|=5 unit

6 0
3 years ago
Other questions:
  • 2x+3=5x-42 what is the number that belongs in the green box
    12·1 answer
  • Simplify... (10x-8) + (4x+5)
    10·2 answers
  • Which of the following choices is the standard deviation of the sample shown
    7·1 answer
  • Please help me I have no clue what to do
    8·1 answer
  • A bag of marbles includes only green and red marbles. The results of an experiment are shown in the table below. What is the exp
    14·1 answer
  • FOR BRAINLIEST<br> А is equivalent to 0.001 grams.<br> milligram<br> kilogram<br> decigram
    13·1 answer
  • If x= 3, then the length of AB is
    12·1 answer
  • 5/8 plus2/5 simplest form​
    11·2 answers
  • Simplify.<br> Remove all perfect squares from inside the square root.<br> √/3065 =
    10·1 answer
  • 1/1-cosA-1/1+cosA=2cotAxcosecA<br>​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!